Method of making welt shoes

ABSTRACT

An improved method of making Goodyear welt shoes which consists in bonding a shoe upper and lining therefor, by placing an intermediate top boxing sheet, prymarily of normally rigid polystyrene, in position, the polystyrene having been softened for operative adhesion, applying pressure to the combination of elements and securing bonding of the liner to the upper, supporting the assembly with an insole positioned under the last, the insole carrying a marginal downwardly-projecting rib disposed inwardly of the edge of the insole, providing a wiper-resistance member, the resistance member conforming with the controur of the last, said resistance member entering the area of the insole inwardly of said rib and closely adjacent thereto, pulling the margins of the insole edge and outwardly of the rib, providing an adhesive-ejecting member adapted for pressure-ejection of a thermo-plastic adhesive on the exposed surface of said rib in a controlled localized manner, exerting inwardly direted action of a wiper, marginally conformed with the resistance member, against the upper and forcing an intermediate area of its margins under the insole and against the adhesive carried by the outer face of the rib, with time-heat interval of the wiper to form a bond, removing the last, and stitching the assembly through the welt, through the inwardly direceted boxed formation of the upper margin, and through the rib close to its apex, to be followed by assembling a filler and outsole to the assembly.

Unite States atent Glickman 51 Aug. 1, 1972 [54] METHOD OF MAKING WELTSHOES [72] Inventor: Arnold Glickman, 73 Jackson Ave.,

Rockville Center, NY. 1 1570 [22] Filed: April 30, 1971 [21] Appl. N0.:138,939

[52] US. Cl. ..12/142 D [51] Int. Cl. ..A43d 9/00 [58] Field of Search..12/7, 7.2, 10.1, 10.5, 12.4,

[56] References Cited UNITED STATES PATENTS 3,251,081 5/1966 Springer..l2/10.l 3,462,783 8/1969 Glickman ..12/142 D Primary ExaminerPatrickD. Lawson Attorney-W. Lee Helms [57] ABSTRACT An improved method ofmaking Goodyear welt shoes which consists in bonding a shoe upper andlining therefor, by placing an intermediate top boxing sheet, prymarilyof normally rigid polystyrene, in position,

the polystyrene having been softened for operative adhesion, applyingpressure to the combination of elements and securing bonding of theliner to the upper, supporting the assembly with an insole positionedunder the last, the insole carrying a marginal downwardly-projecting ribdisposed inwardly of the edge of the insole, providing awiper-resistance member, the resistance member conforming with thecontrour of the last, said resistance member entering the area of theinsole inwardly of said rib and closely adjacent thereto, pulling themargins of the insole edge and outwardly of the rib, providing anadhesiveejecting member adapted for pressure-ejection of athermo-plastic adhesive on the exposed surface of said rib in acontrolled localized manner, exerting inwardly direted action of awiper, marginally conformed with the resistance member, against theupper and forcing an intermediate area of its margins under the insoleand against the adhesive carried by the outer face of the rib,withtime-heat interval of the wiper to form a bond, removing the last,and stitching the assembly through the welt, through the inwardlydireceted boxed formation of the upper margin, and through the rib closeto its apex, to be followed by assembling a filler and outsole to theassembly.

2 Claims, 12 Drawing Figures PATENTEDAUG 1 I972 3.680.162

sum 1 or 2 11'"; a 7 1 O :1 Q 1 ll JMOZJIAVLYTOILM I we METHOD OF MAKINGWELT SHOES My' Invention constitutes an improvement over the methodsubject of my US. Pat. No. 3,462,783 of Aug. 26, 1969.

The invention will be described with reference to the accompanyingdrawings, in which:

FIG. 1 is a schematic view, showing an insole with its inset rib, awelt, a filler piece, an outer sole and a heel, which when assembledwith an upper forms a Goodyear welt shoe.

FIG. 2 is a transverse section through a Goodyear welt shoe taken on aline somewhat inwardly of the toe, and showing section of a last (whichis removed preliminarily to the stitching operation).

FIG. 3 is a top plan view, largely schematic, and

partly in dotted lines and partly broken away, showing the forepart of ashoe in full lines and one form of wipe which can be used. FIG. 4 is aview in elevation and partly in section on the line 4-4, FIG. 3, theview having added thereto gripper members for pulling down margins ofthe upper preliminary to the action of the wiper. The resistance memberhas been shown lowered for clarity of illustration.

FIG. 5 is a vertical section taken on the line 55,

' FIG. 3.

FIG. 6 is a view similar to FIG. 5 showing the opposed grippers actingwith a pull on the upper margins to a greater extent than in FIG. 5. Itis in the position of the elements shown in this Figure that theadhesiveejectirig member is elevated, in a succeeding movement, andoperated.

FIG. 7 is a view similar to FIG. 6 showing release of the grippers at orimmediately preceding the action of the wiper on the upper margins, andafter the adhesiveejecting member has been lowered.

FIG. 8 is an enlarged transverse section similar to FIG. 6 to which hasbeen added a forwardly positioned vertical section of theadhesive-ejecting member taken at the front area thereof, the memberbeing ready for final upward movement to operative position. Sufficientclearance with respect to the gripper is provided so that outward swingthereof is not needed.

FIG. 8 A is a fragmentary vertical section of the elements shown in FIG.8, with the adhesive-ejecting member in position for operation.

FIG. 8 B is a view similar to FIG. 8 A showing the ad hesive-ejectingmember lowered out of view and the wiper, as to a section thereof, movedinto operative position.

FIG. 9 is a top plan view showing the resistance member and theadhesive-ejecting member surrounding the same, the view being in partfull and dotted lines, inlet and flow ducts for the adhesive beingindicated.

FIG. 10 is a schematic generally-perspective'view showing a type ofpolystyrene toe boxing member intermediate a liner and insole, with apressure plate, in section, ready for imposing pressure on the assembly.

The abstract of my method, at the opening of this Specification setsforth the salient steps of the present invention, and in comparison withthe Goodyear weltlasting prior to my US Pat. No. 2,462,783 and themethod of said patent, the invention herein eliminates the handling andtime-taking procedures of brush-applying adhesive to the lining betweenits face and the upper; the like applying of adhesive to the rib of theinsole; and the provision for the latter of an automatically-actinginjector.

To make the disclosure complete without the necessity of specificreference to the drawings of my said patent, FIGS. 1 to 7 of the presentdrawings reproduce FIGS. 1 to 7 of the said patent drawings with likereference characters.

In FIG. 1 the primary elements of a Goodyear welt shoe are shown. At 1is shown an insole to which has been secured an insole rib 2 whichextends downwardly and is inset relatively to the insole outer edge.Under the insole is shown a welt 3. Below the welt is a filler piece 4,followed by an outsoleS and a heel 6. FIG. 2 shows a transverse sectionof the completed shoe just back of the toe area and with a last therein,In allied FIGS. 3 and 4 the lower margins 8 of the upper are engaged bypull clamps 9 and the wiper elements 12 in position. While any suitablewiper may be employed that shown in FIGS 3 and 4 consists of fivesegments pivoted together at 12, the end segments being pivotallyconnected by link 14 engaged by a shaft 15 which will lead to means foradvancing and retracting link 14. At 10x is a resistance member operableby headed shaft 10.

FIGS. 5 and 6 show the lower margins 8 of the upper engaged by the pullclamps 9 and the wiper elements ready for inward movement, and in FIG. 6the resistance member l0 has been raised and engaged with the insole andinner face of the rib 2, the pull clamps having been moved downwardlyand giving clearance for the adhesive injector shown in FIGS. 8, 8A, 8Band 9, which then can be elevated and operated. FIG. 7 shows the stepfollowing the operation of the adhesive injector, the pull clamps 9being released from the upper simultaneously with inwardly pressedwiping force on the margins of the upper against the rib 2. The adhesivenormally is a cement, heat-pressure sensitive, and the wiper surfacesare normally heated, so that, for example, ata heat of 350 F. the wipermay remain withits active pressure engagement of only about 6 seconds tomake the bond. v

Theadhesive-injector is illustrated in FIGS. 8, 8A, 8B and 9 inclusive.Reference to FIG. 9 will show that its body 15 is in marginalconformation with an insole, and that over it is positioned theresistance member 10, 10 the actuating shaft for the latter projectingthrough a large open area of the body 15, shown as bounded by the brokenlines at 15.

The margin of the adhesive-injector 15 is formed as an umstanding curvedchamber, beveled at its top, said beveled face having spaced apertures,indicated at 19,

for passage of the adhesive. At the forward portion of the injector bodyit has a receiving duct for its adhesive chamber, indicated at 18, andcommunicating with a tube-like passage 19 which at its outer end carriesa threaded inlet member 20 adapted for flexible tube connection with asuitable pump device, such as a minature piston pump thrown into actionby a solenoid,

' as well known.

Referring to FIG. 8, it will be understood, in view of the position ofthe actuating shaft 16 for the resistance member 10 shown in FIG. 9,that the vertical section through the adhesive-injector member of theFigure is taken forwardly of the section line 88, FIG. 9, that sectionline being that of the over-lying member of FIG. 8 carrying actuatingshaft 16 which, as shown in FIG. 9, passes through the large passagewayin the adhesive-injector body bounded by dotted lines l5 of that Figure.

Referring to FIG. 8A it will be seen that the adhesiveinjector 15 hasbeen raised to upper operative position, and thereupon by simpleswitch-closing of a circuit through the adhesive pump solenoid, whensuch means are employed, the adhesive will be pressure applied uniformlyto the rib of the insole indicated at 2. The next operation is shown byFIG. 8 B. The adhesive-injector having been lowered, and the grippershaving releasted the lower margins of the upper (as indicated in FIG.7), the wiper is actuated, forcing said upper margins into firmengagement with the adhesive carried insole rib, and holding saidengagement for the time required for bonding, as hereinbefore described.

A step allied with the described Improvements will now be givenreference:

In the construction of a Goodyear welt shoe, the upper assembly usuallyconsists of a lining, box toe and vamp. The box toe frequently is of thepolystyrene type, although other types are used as well. The upper andlining have usually been stitched together around the inner quartermargin, tongue, instep, or throat, depending upon style. However, thelining and the upper around the entire toe-part of the vamp is usuallyloose, and is commonly referred to as a loose lining. By this is meantthat the lining and upper are not adhered together and are attached onlytoward the middle and rear of the vamp. There has been some use of apolystyrene box toe piece which at the time use has been dipped into apolystyrene solution for softening and then slipped between the upperand lining assembled on a wooden last. Then the assembly has been put ina pullover machine, with the operation of pulling the assembly of upper,lining and box toe over the last in the forepart of the shoe and drivingin tacks to temporarily hold the three components together until theassembly goes to another lasting machine. However no thought orachievement was present as to securing a bond between the upper and thelining. By the present Improvement the bondded lining and upper at thecriti-' cal forepart of the shoe is secured, asfollows with reference toFIG.

In FIG. 10, which is merely schematic to indicate'the steps employed, Ihave shown the forepart of an upper at 21, the lining at 22 and aninserted boxing piece, preferably of polystyrene, but which may be ofany material which will fairly rapidly harden after the shoeconstruction is finished, and capable of remaining conformable after aperiod of pressure and preferably both heat and pressure. Polystyrenepreferably carried by a web of fabric supplies these requirements, whenas a solid. sheet it may be softened in a solution of polystyrene forconformation, as over a last.

Before application to a last, the assembly of upper 21, lining 22 andnormally solid piece of polystyrene boxing 23 are associated, first byadequately saturating the boxing piece by the solvent and to the extentof not only softening it for conformation as a box toe piece, but ofproviding an adhesive member thereof capable of strong adhesion when, inthe illustrated assembly, pressure, preferably with heat, is applied tothe upper b a member chematicall indicate at 24.

By the method a permai ient bon is secured betwen the lining, theupper'and the box toe, while the pliability of the box toe piece remainsfor lasting, with subsequent hardening.

Having described my invention, what I claim and desire to secure byLetters Patent is as follows:

' l. A method of making welt shoes which consists in placing a shoeupper on a last,'supporting an insole positioned under the last, theinsole carrying a marginal rib formed with a downwardly projecting lipdisposed inwardly of the edge of the insole, providing awiper-resistance member as an element of said support, the resistancemember generally conforming with the contour of the last at its lowerbase edge, said resistance member entering the area of the insoleinwardly of said rib and closely adjacent thereto, pulling the marginsof the upper over the insole edge and outwardly of the rib,automatically'injecting a thermoplastic type of adhesive intermediatethe rib and the margins of the upper, and on at least one of the two,simultaneously releasing the tension-pull of the margins of the upperand exerting inwardly directed action of a wiper against the upper andthereby forming an intermediate area of its margins under the outer edgeof the insole and against the outer face of the rib, while such actionis opposed by the resistance member, with time interval of the wiper toform a bond, to be followed by removing the last, and stitching theassembly through the welt, through the inwardly directed bondedformation of the margins of the upper and assembling a filler andoutsole to the assembly.

2. A method of making welt shoes in accordance with claim 2, incombination with the steps of combining and bonding a liner to the forearea of an upper and a lining, which consist in providing an upper, alining therefor, and a toe boxing piece primarily of polystyrene andnormally solid, saturating said toe boxing piece with a polystyrenesolution, placing said polystyrene piece between the upper and thelining, and applying pressure to the assembly until the three elementsare bonded together, and removing the bonded elements from the pressuremeans.

1. A method of making welt shoes which consists in placing a shoe upperon a last, supporting an insole positioned under the last, the insolecarrying a marginal rib formed with a downwardly projecting lip disposedinwardly of the edge of the insole, providing a wiper-resistance memberas an element of said support, the resistance member generallyconforming with the contour of the last at its lower base edge, saidresistance member entering the area of the insole inwardly of said riband closely adjacent thereto, pulling the margins of the upper over theinsole edge and outwardly of the rib, automatically injecting athermoplastic type of adhesive intermediate the rib and the margins ofthe upper, and on at least one of the two, simultaneously releasing thetension-pull of the margins of the upper and exerting inwardly directedaction of a wiper against the upper and thereby forming an intermediatearea of its margins under the outer edge of the insole and against theouter face of the rib, while such action is opposed by the resistancemember, with time interval of the wiper to form a bond, to be followedby removing the last, and stitching the assembly through the welt,through the inwardly directed bonded formation of the margins of theupper and assembling a filler and outsole to the assembly.
 2. A methodof making welt shoes in accordance with claim 2, in combination with thesteps of combining and bonding a liner to the fore area of an upper anda lining, which consist in providing an upper, a lining therefor, and atoe boxing piece primarily of polystyrene and normally solid, saturatingsaid toe boxing piece with a polystyrene solution, placing saidpolystyrene piece between the upper and the lining, and applyingpressure to the assembly until the three elements are bonded together,and removing the bonded elements from the pressure means.